Where does “longing-mark” come from?

longing-mark (English) comes from English Mark, from German mark, from Latin Mārcus, from Latin Martīnus, from Latin -īnus, from Proto-Italic -īnos, from Proto-Indo-European -iHnos, from Proto-Indo-European -no- — adjectival suffix.

Ancestry of “longing-mark”, step by step

longing-mark traces back through two separate lines of ancestry.

via English Mark

StepLanguageWordMeaning
1EnglishMarkAbbreviation of Markarian
2Germanmarkmark any of various European monetary units
3LatinMārcus
4LatinMartīnus
5Latin-īnusof or pertaining to; -ine
6Proto-Italic-īnosof/belonging to
7Proto-Indo-European-iHnosCreates adjectives of materials
8Proto-Indo-European-no-adjectival suffix

via English longing

StepLanguageWordMeaning
1Englishlongingpresent participle of long; An earnest and deep,...
2Middle Englishlongynge
3Old Englishlangiende
4Proto-Germaniclangōndz
5Proto-GermaniclangōnąTo desire; long for
6Proto-Indo-Europeanlengʷʰ-light, agile, nimble; light, not heavy, agile,...
Every word from Proto-Indo-European -no-Every word from Latin -īnusEvery word from Latin Martīnus